Problems contributing to the failure of a U.S. Missile Defense Agency (MDA) Ground-Based Midcourse Defense (GMD) flight trial are raising questions about testing conditions as well as quality control of components of the system. Two unrelated issues had a hand in the failure of a Ground-Based Interceptor (GBI) to destroy its target during a Jan. 31 flight trial, according to missile defense sources. A key MDA sensor was not programmed to address a common rocket burn phenomenon that ...


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